江西温泉成因与铀矿化关系研究

STUDY ON THE RELATIONSHIP BETWEEN JIANGXI HOT-SPRING GENESIS AND URANIUM MINERALIZATION

大气降水沿构造裂隙深循环,在地热作用下加温,在适当地质地形条件下出露地表形成温泉。区域性深大断裂特别是现行的深大断裂及其伴生的次级断裂,在与另一组断裂交会部位是温泉形成的重要构造条件。本文研究温泉与铀矿分布规律,它们在空间分布上有一致性,形成的地质构造条件上有相似性,温泉水化学成分与铀矿化特征及其围岩蚀变之间有一定的相关性。在此基础上提出了铀的古热水成矿模式—古脉状承压热水泄水区(减压区)铀成矿模式。

Meteoric precipitation sprang up from underground and formed hot-spring under suitable geological and topographical conditions along the deep cycling of structure rift and heated under the thermal influence. Regional abyssal faults especially the present abyssal faults and accompanied second rifts are important structure conditions of hot-spring formation at another rift cross location. This paper studies the distribution laws of hot-spring and uranium deposit which are of consistency in space distribution and similarity in formed geological structure conditions, hydrochemical compositions of hot spring and uranium mineralization features and wallrock alteration are of certain relativity. On the basis of this, paleothermal mineralization pattern of uranium——uranium mineralization pattern of palaeovein pressurization thermal sluicing area (pressure-reduction area) is put forward.